High CPU Usage

Issue Type: Performance Issue

This happens when ever I open a java file. I keep seeing the message on the bottom bar “Building workspace - 0%” continuously. This process continues even if I close the java file. Only way to get back to normal state is by restarting Visual Studio Code.

Process explorer shows that this extension is loading the CPU. I couldn’t find a way to get any logs to find out what is going on. Clicking on the icon (thumps up) on the status bar shows no anomalies.

VS Code version: Code 1.32.3 (a3db5be9b5c6ba46bb7555ec5d60178ecc2eaae4, 2019-03-14T22:46:48.547Z) OS version: Darwin x64 18.5.0

System Info

Item	Value
CPUs	Intel® Core™ i7-4870HQ CPU @ 2.50GHz (8 x 2500)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: enabled rasterization: unavailable_off surface_synchronization: enabled_on video_decode: enabled webgl: enabled webgl2: enabled
Load (avg)	4, 3, 3
Memory (System)	16.00GB (0.14GB free)
Process Argv
Screen Reader	no
VM	0%

Process Info

CPU %	Mem MB	   PID	Process
   14	    98	  8362	code main
    1	    33	  8369	   gpu-process
    0	   229	  8373	   window (dc-dbsvcs-swarm.yaml — koopid (Workspace))
    0	   295	  8573	     extensionHost
    0	    33	  8592	       electron_node server.js 
    0	    33	  8940	       /Applications/Visual Studio Code.app/Contents/Frameworks/Code Helper.app/Contents/MacOS/Code Helper /Applications/Visual Studio Code.app/Contents/Resources/app/extensions/html-language-features/server/dist/htmlServerMain --node-ipc --clientProcessId=8573
    0	    33	 12933	       electron_node server.js 
    0	    33	 12934	       electron_node server.js 
    0	    16	 12948	       electron_node server.js 
  102	  1327	 25916	       /Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/bin/java -Declipse.application=org.eclipse.jdt.ls.core.id1 -Dosgi.bundles.defaultStartLevel=4 -Declipse.product=org.eclipse.jdt.ls.core.product -Dfile.encoding=utf8 -noverify -Xmx1G -XX:+UseG1GC -XX:+UseStringDeduplication -jar /Users/jjaimon/.vscode/extensions/redhat.java-0.41.0/server/plugins/org.eclipse.equinox.launcher_1.5.300.v20190213-1655.jar -configuration /Users/jjaimon/.vscode/extensions/redhat.java-0.41.0/server/config_mac -data /Users/jjaimon/Library/Application Support/Code/User/workspaceStorage/867c5a5a4233c9061bf36a2506cd597e/redhat.java/jdt_ws
    0	    49	  8576	     watcherService
    0	    82	  8567	   shared-process
    0	    98	 33960	   window (Issue Reporter)
    0	     0	 33963	   /bin/ps -ax -o pid=,ppid=,pcpu=,pmem=,command=

Workspace Info

|  Window (dc-dbsvcs-swarm.yaml — koopid (Workspace))
|    Folder (git_wa): more than 26508 files
|      File types: xml(12502) png(2766) js(1498) jpg(1479) css(1477)
|                  html(1359) jar(919) yml(392) otf(388) json(336)
|      Conf files: package.json(7) launch.json(2) tasks.json(2)
|                  settings.json(1) makefile(1) grunt.js(1) gulp.js(1)
|      Launch Configs: python(14) chrome;

Extensions (40)

Extension	Author (truncated)	Version
vscode-database	baj	2.1.3
haproxy	bma	0.1.1
imagepreview	buz	0.5.1
vscode-markdownlint	Dav	0.25.0
lua-debug	dev	1.1.0
githistory	don	0.4.6
xml	Dot	2.4.0
pgsql	dou	0.1.3
gitlens	eam	9.5.1
vscode-great-icons	emm	2.1.47
vsc-material-theme	Equ	2.8.1
vscode-firefox-debug	hbe	1.7.8
beautify	Hoo	1.4.11
kubernetes-snippets	ipe	0.1.9
svn-scm	joh	1.47.5
ldif	jta	0.1.1
php-cs-fixer	jun	0.1.117
vscode-gutter-preview	kis	0.18.0
vscode-kubernetes-tools	ms-	0.1.18
python	ms-	2019.2.5558
Go	ms-	0.9.2
debugger-for-chrome	msj	4.11.3
vetur	oct	0.17.0
vscode-docker	Pet	0.6.1
material-icon-theme	PKi	3.6.3
psi-header	psi	1.6.7
quicktype	qui	12.0.46
nginx-formatter	ray	0.0.4
java	red	0.41.0
vscode-yaml	red	0.3.0
LiveServer	rit	5.5.1
bash-debug	rog	0.3.4
vscode-nginx	sha	0.6.0
vscodeintellicode	Vis	1.1.4
vscode-java-debug	vsc	0.17.0
vscode-java-dependency	vsc	0.3.0
vscode-java-pack	vsc	0.6.0
vscode-java-test	vsc	0.15.1
vscode-maven	vsc	0.15.1
vscode-ansible	vsc	0.5.2

(5 theme extensions excluded)

[drhelius]

I’m hitting this bug. This process goes nuts:

/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.222.b10-0.fc30.x86_64/bin/java -Declipse.application=org.eclipse.jdt.ls.core.id1 -Dosgi.bundles.defaultStartLevel=4 -Declipse.product=org.eclipse.jdt.ls.core.product -Dfile.encoding=utf8 -noverify -Xmx1G -XX:+UseG1GC -XX:+UseStringDeduplication -jar /home/isanchez/.vscode/extensions/redhat.java-0.50.0/server/plugins/org.eclipse.equinox.launcher_1.5.500.v20190715-1310.jar -configuration /home/isanchez/.vscode/extensions/redhat.java-0.50.0/server/config_linux -data /home/isanchez/.config/Code/User/workspaceStorage/0cca46c54a26d280c43f7d928784ca5b/redhat.java/jdt_ws

Disabling Java Test Runner, Java Dependency Viewer and Maven for Java, killing the process and restarting vscode did the trick for me.

[agigleux]

I have the same problem using the v0.58.0 on Windows 10 or Ubuntu 18 LTS: my CPU is staying at 100% for hours when I open a huge Java project.

I can reproduce the problem with Nuxeo code using the commit 7de66e44f8755ef644b0b2331a7cacb5f19a0c52. When I open it, my CPU is directly jumping to 100% while the RAM is staying at around 8GB. On Ubuntu, I waited more than 4 hours before the loading process is finished.

While this process is running, it’s almost impossible to do something and an extension such as SonarLint can’t run because it relies on what is provided by the Java extension.

Thanks Alex

Item	Value
CPU/RAM	i5-3570 CPU @ 3.40GHz, 3801 Mhz, 4 Core(s) + 32 GB RAM
JDK	AdoptOpenJDK: 11.0.6+10
VS Code Version	1.42.1 (user setup)
Commit	c47d83b293181d9be64f27ff093689e8e7aed054
Date	2020-02-11T14:45:59.656Z
Electron	6.1.6
Chrome	76.0.3809.146
Node.js	12.4.0
V8	7.6.303.31-electron.0
OS	Windows_NT x64 10.0.18362